.AL [type] [indent] [1]
Initialize numbered or alphabetized list.
Specify list, type, and indent of text.
If 3rd argument is 1, spacing between items is suppressed.
Mark each item in list with .LI; end list with .LE.
Default is numbered listing. Default text indent is specified in
register Li.
Arabic numbers.
Uppercase letters.
Lowercase letters.
Roman numerals, uppercase.
Roman numerals, lowercase.